ULTRASONIC TEMPERATURE MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic temperature measuring apparatus by which the temperature change of a fluid coming into contact with the inner surface of a structure can be measured nondestructively. SOLUTION: In the measuring apparatus, ultrasonic waves are transmitted to the outer surface of the structure containing the fluid, an ultrasonic echo signal which is reflected by the interface between the thick wall of the structure and the contained fluid is fetched, and the temperature change of the fluid at the interface between the structure and the contained fluid is continuously measured by using a fact that the amplitude of the ultrasonic echo signal is changed on the basis of the temperature characteristic of an acoustic impedance. The temperature change of the fluid coming into contact with the inner surface of the structure can be measured nondestructively.